Forum Discussion
jplante4
Aug 29, 2018Explorer II
A '99 Serengetti is probably a Magnum chassis with a CAT 3126B 300 horse. I'd guess U-joint (there's a fairly short drive shaft that is usually ignored at lube time) or the PAC brake is acting up. Make sure the PAC brake is off and see if that fixes the issue. Crawl under and try to move the driveshaft and see if the U-joint has any slop.
About Technical Issues
Having RV issues? Connect with others who have been in your shoes.24,188 PostsLatest Activity: Jan 18, 2025